(New York, 1933-1984) Although he is considered one of the most important psychologists of the 20th century, Stanley Milgram never studied Psychology, but rather Political Science at Queens College (New York), where he graduated in 1954, although he subsequently did a postgraduate in Social Psychology at Harvard University after taking various courses in Psychology. Throughout his career he carried out famous experiments, such as the one that concluded that human beings are only six degrees apart, but the best known They are research and experiments on obedience to authority, in which Milgram demonstrated the danger of the subjects' predisposition to obey and how this attitude strips them of their conscience and sense of responsibility for the acts they might commit.

In the epilogue to the publication article of his experiment, Milgram stated that what was dangerous was not authoritarianism, but the principle of authority itself, because in the Vietnam War, for example, the killings were carried out by ordinary people transformed by the obedience to authority. "Terrible measures such as the use of napalm against civilians in Vietnam, the destruction of the American Indian population, and other atrocities stemmed from the authority of a democratic nation." In 2006 the ABC network recreated Milgram's experiment after asking for approval from an ethical committee. The result confirmed Milgram's conclusions 40 years later.